Valve



(No Model.)

M. B. MILLS.

VALVE.

No. 395,501. Patented Jan. 1, 1889.

Jfarfinler Z19 W9 N. PETERS. PholwLilhogmphul: Washinglnn, D. c.

UNITED STATES PATENT OFFICE,

MORTIMER B. MILLS, OF CHICAGO, ILLINOIS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 395,501, dated January 1, 1889.

Application filed August 2, 1833, Serial No. 281,790. (No model.)

To aZZ whom it may concern:

Be it known that I, MORTIMER B. MILLS, a citizen of the U nited States, residing at (hicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Valves, of which the following is a specification.

The particular purpose for which I design my improvement is to afford a substitute for the three-way or four-way cock in. the various connections in which the latter is used for admitting fluid under pressure from a supply into one passage with the valve turned to close the said passage from another passage, and, by re-turning the valve, for shutting off the supply and producing communication of the two passages. In practice these valves get to leak with use, either by wearing out of the metal parts, when the valves have to be discarded, or when they are packed, by wearing out of the packing, which then has to be renewed, in either event causing IHOOIIYOIIIQTIGO and trouble.

My object is to provide a construction of valve in which no packing whatever shall be required, and in the operation oi which there shall be no :i'riction by rubbing together of the parts, and consequent] y no frictional wear.

In the drawings, Figure l shows my improvement in sectional elevation, together with meanslor operatin it. Fl 2 shows the same in duplicate, with suitable operating means; and Fig. 3 is an end view of --the operating means shown in Fig. 3,with the handle broken off.

A is the shell, comprising, preferably, as parts, a T-seetion, r, having a screw-cap, q, in one end and recessed, as shown at a", in its under side, and a T-sectiou, "r, connected with the part 0' by a narrower section of pipe, '1 the connection of the latter with the part 'rbein effected by means of a threarfled gland or reducer, p.

B is a rod extending from the chz'unber afforded by the interimof the section r through the sections r and r, and provided near its extremity in the shell 0' with the gasket 0, forming a valve held by a nut, o, and sulficiently wide to cover the mouth of the section 0- which affords the valve-seat, and against which the valve is normally held by gravity, which may be and preferably is (especially if the device is not used in an upright position) assisted by a spring, 12, surrounding the adjacent projecting end of the rod B and confined between the cap q and valve 0. The opposite end of the rod llavhich extends beyond the section 0', provided with a gasket forming a valve, on, and sufficiently wide to cover the adjacent mouth of the section 1', the edge of which affords the seat for the valve on, which is provided with a washer, m, and a nut, m supports the valve and washer on the rod II, which thus aflords the stem for the two connected valves 0 and on.

To use the device, it is connected at the section 1' with the fluid-supply, the head or pressure of which, by impinging against the valve 0, adds to the weight of the valves and their common stem and ot' the force of the spring a in maintaining a tight closure of the valve upon its seat. \Vhen fluid is to be drawn from the supply, the valve 0 is raised from its seat by pressure ex erted against the outer end of the stem. ll through the medium of a suitable and (amvenientdevicesuch as the lever )whereby the valve m is forced against its seat and the fluid is permitted to How through the outlet-passage I, which may be an ordinary 'l'aucet-spmit, a pipe leading to a receir'er to be expanded, or the like. When it is desired to shut ol'i the supply, the lever C is manipulated or released to permit the valve 0 to re sume its seat, thereby opening the valve on and causing any fluid which may be in the shell Aand passage L to escape through the opening flf in the section 1", which may communicate with the open air, with awaste-pipe, with a receiver to be eXpan ded by the exhaustpressure, or the like. Thus in the case of water as the fluid, the device may be effectively drained of the waste water whenever the sup ply is shut off and by the act of shutting off after the draining operation, whereby freezing is prevented.

A particular application, and the es jiecial one for which I have invented my improved valve device, is that of controlling the airpressure employed as the actuating medium in pneumatic railroad gates and switches. Therein the section r may communicate with the air-pump and the section r from the passage Z with the collapsible receiver or piston mechanism for operating the gate or switch. WVhen applied to either of the purposes last stated, however, owing to the fact that the pressure is frequently required to be applied to two sets of gate-arms, or has to move a switch in two opposite directions, it may be desirable to duplicate the valve device by connecting the sections r through the medium of a T-joint, 7:, Fig. 2, the stem is of which then affords communication with the fluid-supply of either valve device.

The duplicate form should be provided with means whereby the opening of a valve, 0, andclosing of a valve, in, in one will simultaneously produce the opposite effects on the valves of the other.. This may be accomplished by means of a lever, :fulcrumed between and beyond the two connected valve devices in a position to extend at opposite sides of its fulcrum against the projecting extremities of the valve-stems l5, and terminating at one end in a fork, i embracing a cam, D, having a handle, 71 connected with it. By turning the cam in one direction the valves 0 and m in one of the duplicate devices are respectively opened and closed, permitting the flow through it of. fluid from. the supply, while the valves of the other are respectively and at the same time closed and opened, shutting off the nessure-supply and permitting the fluid previously passed ihrou gh a passage, Z, to escape through a passage, Z. The reverse movement of the cam produces the contrary operations of the valves in the respective valve devices.

It will thus be seen that the construction affords a simple valve device which possesses the qualities of durability and effectiveness and convenience in its purpose. Of course the details of the construction may be varion sly modified without thereby departing from my invention, as hereinafter claimed. For example, the shell A may be of any suitable form and construction.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. A valve device comprising, in, combination, a shell having a chamber at one end provided with an inlet-opening and containing a valve-seat, and a chamber at its opposite end having an outlet-opening, Z, and a discharge-opening, Z, a rod, B, extending from the first-named chamber through and beyond the discharge-opening Z, and having a valve, 0, at one end normally against the said valveseat, and a valve, on, toward its opposite end normally away from its seat and beyond the discharge-opening Z, substantially as and for the purpose set forth.

2. A valve device comprising, in combination, two shells, A, each having a section, '1', provided with an inlet-opening, a section, 0-, communicating with the section 4* through a reduced passage, 4' and having a dischargeopening, Z, and an outlet-opening, Z, between the inlet and discharge openings for waste or return fluid, a valve, 0, normally maintained against its seat in the section 1', a valve, m, normally maintained away from its seat at the discharge-opening l, and a rod, B, connecting the two valves, a pipe, 7t, connecting the sections 0' of the two shells and having an opening, 71:, and a lever, C, fulcrumed in position to engage with the valves m at opposite sides of its fulcrum and provided with a fork, i, at one end, and a cam, D, in the fork, substantially as described.

MORTIMER B. MILLS. In presence of-- M. J. BoWERs, J. W. DYRENFORTH. 

